New revision of F1 GEMINI is done and ready to ship. This hella versatile dual based LN2 pot is more massive this time around. Enhanced control and swing on slower base and more speed on fast LN2 base are some of the performance improvements for 2nd revision. High quality cnc machining, bright nickel plating on bases, and black anodizing on lower hold down plate and F1 GEMINI body sleeve. Pics coming in a minute..enjoy.

Differences between pots are speed and options. Dark is a solid copper pot with massive solid copper feel. Slow temp swings down after pouring LN2, and slow recovery (container warmup) after Ln2 from each pour boils off.
Gemini is faster up and down. Fast base is really fast, and slow base is a bit faster than Dark. Gemini comes in handy when dealing with cold boots especially and situations where you need to pull down/up as quickly as possible. More experienced users see the strengths of Gemini better I think.
Both pots have their strong points and fill certain LN2 benching needs the best way they can.